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[Cob] sawdust in cob "Coblite" & Diet CobCharmaine Taylor dirtcheapbuilderbooks at gmail.com
Wed Jun 10 13:37:37 PDT 2009
Coblite" or I call it DIET COB- [ also called cob-wood, etc.] I have infilled my studio walls with a clay-lime sawdust mix, both as damp mix dumped in between form boards, also I cast the blocks of coblite with a high percentage of sawdust additive-- this is NOT cob anymore, but is something new.. so use accordingly as infill, not load bearing! I have written about this for years, where people have free sawdust from mills, or wood chips it is a fast easy German method used as insulation and thinner inner walls in houses. and in Japan full walls are made of this with a clay/lime plaster over top. they use bamboo as lath, and plaster and infil with clay, [ I have a 7.3 MB PDF file on Japanese clay walled houses like this- email me for it] to cast a block in the sun, use a cardboard box, line cement/stone blocks around it to keep it from blowing out, and make a mix of 12 parts sawdust- 3 parts clay and 1-2 part lime ( I add it to all to prevent mold but try without too) more sawdust gives a more friable crumbly block, less gives a denser more cob like block. to MIX I use an old wringer washer, pour in water, clay, let clay get to a thick slurry, and add lime, then sawdust until a thick doughy mass, pour by small bucket into a form- I have used wire shelving from a bread store- 6' long, 4" tall on both sides, and open on the ends. lay in newspaper or cardboard- add a brick to each end to keep wet mix in and dry in the sun, lay an old window over top to solar bake it faster. cut to size as needed to fit between studs or as needed. use the wet mix to pour in areas that are unusual shape. you can use wood, ply, pegboard, cardboard, metal, and heavy fabric as the form to hold the mix in place. I even stretched cheesecloth across studs, painted with clay and let stiffen, and added a crumbly wet wet mix in as insulation fill. you can easily plaster over with clay or lime and smooth out if you want. the only drawback is to remember to place wood "headers" where you may want to hang things like cabinets, shelves heavy mirrors, picture frames. etc. -- pic of bread rack as form> http://www.dirtcheapbuilder.com/dicd.html block can be cut when 'green' to shape Ms. Charmaine Taylor/ Taylor Publishing Toll Free Order: 1-888-441-1632 www.dirtcheapbuilder.com www. papercrete.com PO Box 375, Cutten CA 95534
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